Stop mechanism for presses.



G. T. BULLOCK.

STOP MECHANISM FOR PRESSES.

APPLICATION FILED JUNE 26.1913.

1,131,597. Patented Mar. 9, 1915.

3 SHEETSSHEET l.

Imvenfor wihlesses THE NORRIS PETERS (20.. PHOTc-LITHD.v WASHINGIvVV, Dv c.

G. T. BULLOCK.

STOP MECHANISM FOR PRESSES. APPLICATION FILED 111N326, 1913.

1,131,597. Patented Mar.9,1915.

3 SHEETS-SHEET 2.

lllllllll I /.-////I/////// WW I? M GIIOI'IIQQS THE NORRIS PETERS 60., PHOTO-L/THQ. WASHINGTON. D. c.

G. T. BULLOCK.

STOP MECHANISM FOR PRESSES. APPLICATION FILED JUNE 26. 1913.

1,131,597, Patented Mar. 9, 1915.

3 SHEETS-SHEET 3.

l iii 36 37 32 855- witnesses THE NORRIS PETERS 50., PHom-LITHQ, WASHINGTON. D. C.

UNTTED TATE$ CHARLES THOMAS BULLOCK, F WINTERVILLE, GEORGIA.

STOP MECHANISM FOR PRESSES.

Application filed. June 26, 1913.

To all whom it may concern:

Be it known that 1, CHARLES THOMAS BULLOCK, a citizen of the United States, residing at Winterville, in the county of Clarke and State of Georgia, have invented certain new and useful Improvements in Stop Mechanism for Presses; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to stop mechanism for presses and has for an object to provide a stop motion for screw-operated cotton presses and the like, with improved means for disconnecting and reversing the power when the plunger has reached either the upward or downward limit of its movement.

A further object of the invention is to provide improved means for manually actuating the stop motion.

With these and other objects in view the invention comprises certain novel constructions, combinations and arrangement of parts as will be hereinafter more fully described and claimed.

In the drawings: Figure 1 is a view of a conventional press seen in side elevation with the stop mechanism applied thereto showing the plunger at its downward limit. Fig. 2 is a View of the press in end elevation. Fig. 3 is a sectional view of the press showing the power applying means. Fig. 4: is an edge view of the disengaging means. Fig. 5 is a view in top plan of the manual disengaging means. Fig. 6 is a view of the manual disengaging means in side elevation. Fig. 7 is a section of the manual disengaging means taken on lines 8-8 of Figs. 1 and 5.

Like characters of reference designate corresponding parts throughout the several views.

The improved stop motion which forms the subject matter of this application is adapted to be associated with any screw press of the usual and ordinary type shown conventionally as comprising the press boxes 10 mounted to rotate upon the strut 11 and turntable 12. The type of press, whether a single press or a double revolving press is, of course, immaterial to the present 111- vention. The press is provided with a plunger block 13 actuated by the screw 14, gear 15 and pinion 16 in substantially the Specification of Letters Patent.

Patented Mar. 9, 1915.

Serial No. 775,945.

usual and ordinary manner. The pinion 16 is carried rigidly upon a shaft 17 which is provided with a friction wheel 18 having an outer rim 19 and inner rim 20 likewise of the usual and ordinary type.

Adjacent the wheel 18 is a bearing 21 upon which is fulcrumed a lever control 22 which carries a bearing 23 for the power shaft 2 1. The shaft 2 1 carries a friction wheel 25 adapted to engage with either of the rims 19 or 20 as the lever 22 may be raised and lowered to thereby rotate the wheel 18, shaft 17, pinion 16 and gear 15 in either direction, the'power wheel 25 being driven constantly in the same direction. In so far as just described the device does not differ materially from the devices already in use, and it will be obvious that any other starting stopping and reversing mechanism than that shown and described may be employed so long as it is controlled by the movement of the lever 22.

To the control lever 22 a bar 26 is pivoted extending upwardly through the floor 27 in position to be engaged by an operative, a handle 28 being provided for such manual engagement. It will be apparent that as the bar 26 is raised or lowered manually or otherwise the lever 22 is operated to control the action of the power wheel 25 and cause it to rotate the screw gear 15 in either direction.

Adjacent the guide-way for the block 13- is an upright 29 upon which is pivoted a rocking lever 30 having one end extending under the block 13 as shown particularly at Figs. 1 and 2 and its opposite end extending under the lever 22 as shown also in the same views. The levers are so placed that when the block 13 descends to its lowest limit the lever 30 will act upon the control lever22 to raise the power wheel 25 out of engagement with the friction rim 20 and finally to throw it into engagement with the other friction rim 19 and reverse the direc tion of rotation of the gear 15. To maintain the lever 22 in raised position the bar 26 is provided with a rack of ratchet teeth 31 engaged by a detent 32. The detent 32 is pivoted at 33 between ears 31 on a block 3 1 which is mounted to slide upon a base 35 between guides 37 thereon, so that the block 34 and detent 32 may be moved to draw the detent out of engagement with the ratchet teeth 31. To move such block, rods 36 are slidably mounted in said guides 37 and in other guides 37 (see Fig. 6), and the remote ends of the rods are connected to cross bar 38. Between the cross bar 38 and the guides 37 springs 39 are mountedto normally hold the block 34 so that the detent is in engagement with theratchet teeth It will be apparent, therefore, that as the bar 26 is raised by the descent of the press block the former will be maintained in elevated position by the engagement of the'detent 32 with the ratchetteeth 31. When the press is to be first started the bar 26 is manually raised by the use of the handle 28 until the power wheel .25 is in engagement with the rim 19 and is held in such elevated position by the engagement of the detent 32 with the ratchet teeth 31. A chain 40 r1ses from the inner end of the lever 30 through the. floor 27 and is connected with the outer end of a lever 41 which is pivoted at 41 between its ends and has its inner end connected by a link 42 with said crossbar 38. A chain 50 connects the outer end of the lever with the press block as best seen in Fig. 2. When the press has been operated until the press block has movedto its upward limit the chain 50 attached to such press block is drawn, taut thereby ra1s1ng the endof the lever 30 which is under the press block and drawing down upon the chain 40 and lever 41. The depressingof the lever 41 through the medium of the link 42 and rods 36 seen particularly at Figs. 6 and 8 moves the block 34 and detent 32 until the detent f3 clears the teeth 31 of the ratchet and permits the bar 26 todrop. At

the upper end of the ratchet bar 26 a large tooth 43 or stop which now engages the detent 32 andsuspends the power wheel 25 intermediate the rims 19 and 20 and position to turn the screw 14 in either d1- rection. This occurs when the press block has reached the upward predetermined limit of its movement and the bale in such press has been desirably compressed. After properly ty mg the bale the press block is caused to descend by manually applying the foot to or otherwise manipulating a lever 41 to throw the block 34 and detent 32 to the position to clear the large tooth or stop 43, whereupon the bar 26. and lever 22 will drop untl the power wheel 25 isin engagement wit the rim 20. It will thus be seen that a stop actionforthe upward movement of the press block is provided, thereby eliminating the danger of breakage from strain set up by too great a compression of the bale when moving upwardly; I a

There is an advantage also secured in having the driving mechanism stop when the block 13 reaches its downward limit, or rather just before it reaches the same, in that the gear 15 will not turn out of engageme'nt with the screw 16 and it will not be necessary, when it is desired to run the plunger block up again, to turn the gear byhand until it reengages the threads on said screw 16, as is done under the stop system now used on presses.

I claim:

The combination with a press having a movable reversing mechanism and a lever for controlling the same, of a bar connected with the lever, means for maintaining the bar at one limit of its movement, means connected with the press for permitting the bar to move to and checking its movement at a point intermediate its limits of movement, and means for releasing the bar entirely and permitting it to move to its other limit of movement.-

2. The combination with a press having movable reversing mechanism and a lever for controlling the same, of a bar connected with the lever, a ratchet carried by the bar, a detent positioned to engage the ratchet, means connected with the press for raising the bar at one limit of themovement of the press, means connected with the press for releasing the detent at the other limit of movement of said press andpermitting the bar to move to an intermediate position, and manually operable means forreleasing the bar and permitting it to move to its lower limit Of movement. r

3. The combination with a press having a friction wheel embodying inner and outer rims, a friction drive wheel interposed between the rims, a control lever adapted to move the drivewheel into engagement with either of said rims, a bar eonnected with the lever and provided with a. ratchet, and a detent movably positioned adjacent the ratchet; of a rock lever having one end heneath the control lever and its opposite end beneath a moving part ofthe press, a flexible member connecting said last-named end with said moving part of the press, a second flexible member connected to said rock lever and adapted to move said detent, a stop carried by the bar in positio n to engage the de tent, and means permitting a manual operation ofthe detent to release the same from the stop.

4. The combination with a press having a friction wheel embodying inner and outer rims, and a drive wheel interposed and movable between the rims, of a vertically slidable bar positioned to control the driving wheel, a lever-having one end under a movingpart ofthe' press and the other end adapted to raise the bar, a flexible connecting member having one end attached to a moving part of the press and the opposite end to the lever, a detent positioned-to engage and maintain the bar in, raised position, a-fstop intermediate the limits of movement of the bar adaptedtoengage the detent, and manually operable means for releasing the detent from the stop.

5. In a press, a bar engaging and releasing means comprising a base, a block slidable upon the base, a detent pivoted to the block, a lever pivoted upon the base and connections between the lever and the sliding block.

6. In a press stop motion, a bar engaging and releasing means comprising a base, a block slidable upon the base, a bar engaging detent pivoted to the block, a lever pivoted to the base, a cross bar connected with the lever, rods connecting the cross bar and block, and springs adapted to yieldingly hold the detent in engagement with the bar.

In a press stop motion, the combination with a power control lever, and an upright bar connected therewith and having on its edge a series of teeth with a large tooth at the upper end of the series; of a movable block, a detent thereon, yielding means moving the block normally forward into position for the detent to engage said teeth, connections between the press plunger and lever for raising the latter and said 00p!" of this patent may be obtained for he cents each, by addressing the Commissioner bar when the plunger descends, and means actuated by the rise of the plunger for retracting said block until the detent disengages said rack teeth and finally also said larger tooth, for the purpose set forth. 8. In a press stop motion, the combination with a power control lever, and an upright bar connected therewith and having on its edge a series of teeth; of a movable block, a detent thereon, yielding means moving the block normally forward into position for the detent to engage said teeth, connections between the press plunger and lever for raising the latter and said bar when the plunger descends, and means actuated by the rise of the plunger for retracting said block until the detent disengages said teeth, for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES THOMAS BULLOCK. Witnesses:

J. S. Come, C. W. PITTARD.

of Iatents,

Washington, D. 0. 

